CN115804253A - Power conversion system and maintenance support device - Google Patents
Power conversion system and maintenance support device Download PDFInfo
- Publication number
- CN115804253A CN115804253A CN202180038551.5A CN202180038551A CN115804253A CN 115804253 A CN115804253 A CN 115804253A CN 202180038551 A CN202180038551 A CN 202180038551A CN 115804253 A CN115804253 A CN 115804253A
- Authority
- CN
- China
- Prior art keywords
- filter
- power conversion
- air
- power
- clogging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The power conversion system is provided with: a power conversion device that converts power; a case having an internal space for housing the power conversion device, an air inlet for taking in the external air into the space, an air outlet for discharging the air in the space to the outside of the space, and a filter provided in the space so that the external air taken in from the air inlet passes through the filter; a fan that discharges air in the casing through the exhaust port and takes in outside air from the intake port into the casing; and a maintenance support device having a measurement unit that measures a clogging state of the filter, and a monitoring device that performs a notification operation of notifying that clogging of the filter is detected when the clogging state of the filter measured by the measurement unit exceeds a threshold value. Thus, a power conversion system and a maintenance support device are provided, which can easily grasp the timing of maintenance of a filter.
Description
Technical Field
Embodiments of the present invention relate to a power conversion system and a maintenance support device.
Background
Such a power conversion system is known: the power conversion device includes a power conversion device that converts power and a case that houses the power conversion device in an internal space. Power conversion systems are used, for example, in solar power generation systems. In a photovoltaic power generation system, a power conversion device converts dc power input from a solar cell panel into ac power and outputs the ac power to a power system. Such a power conversion device is called a power conditioner, for example.
The power conversion device and the housing are installed outdoors for use, for example. The case accommodates the power conversion device in an internal space, thereby protecting the power conversion device from wind, rain, dust, and the like.
The power conversion device includes, for example, a plurality of switching elements, and performs power conversion by switching the plurality of switching elements. Further, the power conversion device stops the power conversion operation in order to protect each device such as the plurality of switching elements when the temperature of the device becomes equal to or higher than a predetermined value.
Therefore, in the power conversion system, the fan is provided to take in the outside air into the casing to cool the power conversion device, and the operation of power conversion of the power conversion device is suppressed from being stopped along with a temperature increase.
The housing has an air intake port, an air exhaust port, and a filter. The fan cools the power conversion device by discharging air in the casing from the exhaust port and taking in outside air from the intake port into the casing. The filter is provided so that the outside air taken in from the air inlet passes therethrough, and prevents dust and the like contained in the outside air from entering the casing.
In such a power conversion system, there is a possibility that the filter is clogged due to the continuous operation of the fan. If the filter is clogged, the power converter cannot be cooled properly, and the temperature of the power converter may increase, or the power converter may stop the power conversion operation. In addition, the load of the fan may increase, which may cause a failure of the fan. Therefore, in the power conversion system, it is necessary to periodically perform filter maintenance such as cleaning and replacement to remove clogging of the filter.
However, it is very troublesome for a manager or the like of the power conversion system to visually check the clogging state of the filter one by one. In addition, when the clogging state of the filter is visually checked, the judgment of the timing of performing the maintenance of the filter is given to the sensibility of a manager or the like. Therefore, there is a concern that maintenance is performed beyond the necessary limit, and the labor of a manager or the like is increased, or conversely, maintenance is not performed even when the necessary period of time has elapsed, and the filter is clogged.
Therefore, in the power conversion system, it is desirable to be able to easily grasp the timing of maintenance of the filter.
Documents of the prior art
Patent document
Patent document 1: international publication No. 2018/105010
Disclosure of Invention
Problems to be solved by the invention
An embodiment of the present invention provides a power conversion system and a maintenance support device that can easily grasp the timing of filter maintenance.
Means for solving the problems
According to an embodiment of the present invention, there is provided a power conversion system including: a power conversion device that converts power; a case having an internal space for housing the power conversion device, an air inlet for taking in outside air into the space, an air outlet for discharging air in the space to the outside of the space, and a filter provided in the space so that the outside air taken in from the air inlet passes through the filter; a fan that discharges air in the housing through the air outlet and takes in outside air from the air inlet into the housing; and a maintenance support device having a measurement unit that measures a clogging state of the filter, and a monitoring device that performs a notification operation of notifying that clogging of the filter is detected when the clogging state of the filter measured by the measurement unit exceeds a threshold value.
Effects of the invention
According to the embodiments of the present invention, it is possible to provide a power conversion system and a maintenance support device that can easily grasp the timing of filter maintenance.
Drawings
Fig. 1 is a block diagram schematically showing a power conversion system according to an embodiment.
Fig. 2 is a flowchart schematically showing an example of the operation of the power conversion system according to the embodiment.
Fig. 3 is a block diagram schematically showing a modification of the power conversion system according to the embodiment.
Fig. 4 is a block diagram schematically showing a modification of the power conversion system according to the embodiment.
Fig. 5 is a block diagram schematically showing a modification of the power conversion system according to the embodiment.
Detailed Description
Hereinafter, embodiments will be described with reference to the drawings.
The drawings are schematic or conceptual, and the relationship between the thickness and width of each portion, the ratio of the sizes of the portions, and the like are not necessarily the same as actual ones. Even when the same portions are shown, the sizes and ratios may be different from each other in some cases according to the drawings.
In the description and drawings of the present application, the same elements as those described with respect to the already-appearing drawings are denoted by the same reference numerals, and detailed description thereof is omitted as appropriate.
Fig. 1 is a block diagram schematically showing a power conversion system according to an embodiment.
As shown in fig. 1, the power conversion system 10 includes a power conversion device 12, a casing 14, a fan 16, a maintenance support device 18, a breaker 20, and a transformer 22.
The power conversion device 12 is connected to the power supply device 2 and to the power system 4 via a breaker 20 and a transformer 22. The power system 4 may be a plant load or the like, for example. The power supply device 2 is, for example, a solar panel. The power supply device 2 outputs dc power to the power conversion device 12. Further, a breaker or the like may be provided between the power supply device 2 and the power conversion device 12.
The power system 4 is, for example, an ac power system. The ac power of the power system 4 is, for example, three-phase ac power. The power conversion device 12 converts dc power input from the power supply device 2 into ac power corresponding to the power grid 4, and outputs the converted ac power to the power grid 4 via the breaker 20 and the transformer 22. Thereby, the power conversion device 12 interconnects the power supply device 2 and the power system 4.
The power conversion device 12 includes, for example, a plurality of switching elements, and performs power conversion by switching the plurality of switching elements. In addition, the power conversion device 12 has a case 12a. The power conversion device 12 houses a plurality of devices such as switching elements in a casing 12a.
The power converter 12 has a temperature sensor, not shown, and detects the temperature of internal devices such as switching elements. In other words, the temperature sensor detects the temperature inside the housing 12a. The power converter 12 stops the power conversion operation to protect each device such as the plurality of switching elements when the temperature detected by the temperature sensor is equal to or higher than a predetermined value. Further, the power conversion device 12 may have a plurality of temperature sensors. The power converter 12 may stop the power conversion operation when any one of the temperatures detected by the plurality of temperature sensors is equal to or higher than a predetermined value.
In this example, the power conversion system 10 includes two power conversion devices 12. The two power conversion devices 12 are connected to the power supply device 2 and to the power system 4 via a breaker 20 and a transformer 22, respectively. However, the number of power converters 12 provided in the power conversion system 10 is not limited to two, and may be one, or may be three or more. The number of power conversion devices 12 provided in the power conversion system 10 may be any number according to the magnitude of the dc power (the power generation capacity of the solar panel) output from the power supply device 2, or the like.
The power supply device 2 is not limited to the solar panel, and may be another generator such as a wind turbine generator or a gas turbine generator. The power input to the power supply device 2 is not limited to dc power, and may be ac power. The power converter 12 may be configured to convert ac power input from the power supply device 2 into other ac power corresponding to the power system 4.
The power supply device 2 may be, for example, a power storage device. The power converter 12 may be configured to convert dc power input from the power supply device 2 into ac power corresponding to the power grid 4, output the converted ac power to the power grid 4, and convert ac power input from the power grid 4 into dc power to charge the power supply device 2.
The power supply device 2 may be another power system different from the power system 4, for example. The power conversion device 12 may be a frequency conversion device that interconnects two power systems having different frequencies, for example. The power system 4 may be a plant load of dc power. The power converter 12 may be configured to convert dc power supplied from the power supply device 2 into other dc power corresponding to a plant load. In this way, the power conversion by the power conversion device 12 is not limited to the conversion from dc to ac, and may be any conversion. The power converter 12 may have any configuration for converting electric power.
The circuit breaker 20 switches between a state in which the transformer 22 and each power conversion device 12 are connected to the power grid 4 and a state in which the transformer 22 and each power conversion device 12 are disconnected from the power grid 4. The circuit breaker 20 disconnects the transformer 22 and each power conversion device 12 from the power grid 4 when an abnormality occurs in any one of the power supply device 2, the power grid 4, and the power conversion system 10, for example.
The transformer 22 transforms the magnitude of the ac voltage output from each power conversion device 12 to the magnitude of the ac voltage corresponding to the power system 4.
Further, the power conversion system 10 does not need to include the breaker 20 and the transformer 22. The circuit breaker 20 and the transformer 22 may be provided separately from the power conversion system 10, for example. The breaker 20 and the transformer 22 are provided as needed, and may be omitted.
The housing 14 has an internal space SP. The housing 14 is, for example, a substantially rectangular hollow box shape. The case 14 is sometimes called a package or a housing, for example. The housing 14 houses the power conversion devices 12 in the space SP inside. The housing 14 also houses, for example, a circuit breaker 20 and a transformer 22. The housing 14 is provided for outdoor use. The case 14 protects the power converters 12, the circuit breaker 20, the transformer 22, and the like housed in the space SP from wind, rain, dust, and the like. However, the housing 14 need not be provided outdoors. The housing 14 may also be provided for use indoors.
The case 14 further divides the space SP into three spaces, and stores each of the power conversion device 12, the breaker 20, and the transformer 22 in a different space. However, the structure of the housing 14 is not limited thereto. The housing 14 may house the power conversion devices 12, the circuit breaker 20, and the transformer 22 in one space SP. The case 14 does not need to house the breaker 20 and the transformer 22. The breaker 20 and the transformer 22 may be housed in a case different from the case 14 housing the power conversion devices 12, for example. The case 14 may have any structure capable of housing at least the power conversion devices 12.
The fan 16 cools the power conversion device 12 by taking in the outside air into the casing 14. This stops the operation of the fan 16 for suppressing the power conversion of the power conversion device 12 with an increase in temperature.
In this example, the fan 16 is provided in the power conversion device 12. In other words, the power converter 12 includes the fan 16. In this example, the power conversion system 10 includes two fans 16 corresponding to the two power conversion devices 12, respectively. The fan 16 cools the power conversion device 12 by taking in outside air into the casing 14 and taking in air in the casing 14 into the casing 12a of the power conversion device 12.
However, the fan 16 may be provided in the housing 14, and is not limited to the power conversion device 12. In this case, one fan 16 may be provided for each of the two power conversion devices 12. Further, the power conversion system 10 may include a plurality of fans 16, such as the fan 16 provided in the power conversion device 12 and the fan 16 provided in the casing 14. The structure of the fan 16 may be any structure capable of appropriately cooling the power conversion device 12. The fan 16 may be configured to take in the outside air into the space SP in the casing 14 in which at least the power converter 12 is housed. The number of fans 16 may be any number that can appropriately cool the power conversion device 12.
The housing 14 has an intake port 30, an exhaust port 32, and a filter 34. The intake port 30 and the exhaust port 32 are provided in an opening of the casing 14 so that the space SP inside the casing 14 communicates with the outside of the casing 14. The air inlet 30 is an opening for taking in the outside air into the space SP. The air outlet 32 is an opening for discharging the air in the space SP to the outside of the space SP.
The intake port 30 and the exhaust port 32 are provided in, for example, a side surface portion of the casing 14. The air inlet 30 and the air outlet 32 are provided with members such as a cover and a grill for suppressing obstruction to the passage of the outside air and suppressing direct intrusion of wind and rain into the casing 14.
The fan 16 cools the power converter 12 by discharging air in the casing 14 through the air outlet 32 and taking in outside air into the casing 14 through the air inlet 30.
The filter 34 is provided in the space SP of the casing 14 so that the outside air taken in from the air inlet 30 passes therethrough. This suppresses the intrusion of dust, salt, and the like contained in the outside air into the housing 14 by the filter 34. The filter 34 is, for example, a mesh-like member. The filter 34 may have any structure that allows the passage of the external air (air) and suppresses the passage of dust, salts, and the like contained in the external air.
The filter 34 is provided in the vicinity of the intake port 30 in the casing 14, for example. The filter 34 is provided so as to cover the intake port 30, for example, so as to face the intake port 30. This can prevent the outside air taken in from the air inlet 30 from entering the casing 14 without passing through the filter 34.
However, the structure of the filter 34 is not limited thereto. For example, a pipe may be connected to the suction port 30, and the filter 34 may be disposed in the pipe. The filter 34 may be any structure capable of appropriately suppressing the intrusion of dust, salt, and the like contained in the outside air into the case 14.
In this example, the casing 14 has two intake ports 30 and two filters 34 provided corresponding to the two intake ports 30, respectively. However, the number of the air inlets 30 and the number of the filters 34 are not limited to two, and may be one or three or more. The number of the air inlets 30 and the number of the filters 34 may be any number. The number of filters 34 does not have to be the same as the number of inlets 30. For example, one filter 34 may be provided for each of the two suction ports 30. In other words, one filter 34 may cover both of the suction ports 30. Conversely, two filters 34 may be provided for one suction port 30. In other words, one air inlet 30 may be covered with two filters 34 arranged in parallel.
In this example, the casing 14 has two exhaust ports 32 corresponding to the two fans 16 provided in the two power conversion devices 12, respectively. The fan 16 is disposed opposite to the exhaust port 32, for example. This enables air in the housing 14 to be efficiently discharged from the exhaust port 32. However, the structure of the fan 16 is not limited to this. The fan 16 may be connected to the exhaust port 32 via a duct or the like, for example, to discharge air in the casing 14 from the exhaust port 32. For example, when the fan 16 is provided in the housing 14, the fan 16 may be fitted into the air outlet 32. When the fan 16 is provided in the casing 14, the fan 16 may be provided on the outer surface side of the casing 14, for example. The number of the exhaust ports 32 does not have to be the same as the number of the fans 16. For example, two fans 16 may be arranged in parallel to one exhaust port 32.
The maintenance support device 18 includes a differential pressure gauge 40 and a monitoring device 42. The differential pressure gauge 40 measures a differential pressure between a pressure on the front surface side of the filter 34 and a pressure on the back surface side of the filter 34. The front surface of the filter 34 is, more specifically, a surface on the side where the outside air flows into the filter 34. The back surface of the filter 34 is, more specifically, a surface on the side from which the outside air flowing into the filter 34 flows out of the filter 34. The front surface of the filter 34 is a surface that comes into contact with the outside air through the air inlet 30, and the back surface of the filter 34 is a surface that comes into contact with the air in the casing 14. In other words, the differential pressure gauge 40 measures a differential pressure between a pressure on a surface side of the filter 34 into which the outside air flows and a pressure on a surface side of the filter 34 from which the outside air flows. The pressure measured by the differential pressure gauge 40 is more specifically air pressure (static pressure).
When dust or the like adheres to the front surface side of the filter 34 and the filter 34 is clogged due to the continuous operation of the fan 16, a differential pressure between a pressure on the front surface side of the filter 34 and a pressure on the back surface side of the filter 34 becomes higher than in a state where the filter 34 is not clogged. This enables the differential pressure gauge 40 to measure the clogging state of the filter 34. That is, the differential pressure gauge 40 functions as a measurement unit that measures the clogging state of the filter 34.
The maintenance support device 18 includes two differential pressure meters 40 corresponding to the two filters 34, respectively. The number of the differential pressure gauges 40 is the same as the number of the filters 34, for example. When a plurality of filters 34 are provided, the maintenance support device 18 measures the clogging state of each of the plurality of filters 34 by providing a plurality of differential pressure gauges 40.
However, the number of the differential pressure gauges 40 does not have to be the same as the number of the filters 34. For example, in a case where a plurality of filters 34 are provided in the housing 14, when the temporal change in the clogging state of the plurality of filters 34 is of the same level in each of the plurality of filters 34, one differential pressure gauge 40 may be provided for the plurality of filters 34. That is, when a plurality of filters 34 are provided, the clogging state of only one filter 34 may be typically measured.
The monitoring device 42 is provided in the space SP of the casing 14, for example. The monitor 42 is connected to each differential pressure gauge 40, and receives an input of a measurement result of the differential pressure from each differential pressure gauge 40. The monitoring device 42 determines whether or not the differential pressure measured by the differential pressure gauge 40 is equal to or greater than a threshold value. In other words, the monitoring device 42 determines whether or not the clogging state of the filter 34 measured by the differential pressure gauge 40 exceeds a threshold value. The monitoring device 42 determines that the clogging state of the filter 34 exceeds a threshold value when the differential pressure measured by the differential pressure gauge 40 is equal to or greater than the threshold value. In other words, the monitoring device 42 detects clogging of the filter 34 when the differential pressure measured by the differential pressure gauge 40 is equal to or greater than the threshold value.
The monitoring device 42 may determine that the clogging state of the filter 34 exceeds the threshold value, for example, when an average value of the differential pressures measured by the differential pressure gauge 40 per predetermined time is equal to or greater than the threshold value. This can suppress erroneous inspection due to a change in instantaneous differential pressure caused by the influence of wind or the like, for example. The monitoring device 42 may determine that the clogging state of the filter 34 exceeds the threshold value, for example, when the integrated value of the differential pressure measured by the differential pressure gauge 40 per predetermined time is equal to or greater than the threshold value. In this case, the false check can be suppressed as well.
The monitoring device 42 performs a notification operation for notifying that clogging of the filter 34 is detected when the differential pressure measured by the differential pressure gauge 40 is equal to or greater than a threshold value. In other words, the monitoring device 42 performs a notification operation for notifying that the clogging of the filter 34 is detected when the clogging of the filter 34 measured by the differential pressure gauge 40 exceeds a threshold value. The monitoring device 42 performs a reporting operation when, for example, the clogging state of any one of the plurality of filters 34 measured by the plurality of differential pressure meters 40 exceeds a threshold value. In other words, the monitoring device 42 performs the reporting operation when the clogging of any one of the plurality of filters 34 is detected. The monitoring device 42 may perform the reporting operation when the average value of the differential pressures measured by the differential pressure gauge 40 or the integrated value of the differential pressures is equal to or greater than a threshold value.
The monitoring device 42 is configured to be able to communicate with the external device 6 provided outside the casing 14, for example. The communication between the monitoring apparatus 42 and the external device 6 may be wired or wireless. The monitoring device 42 transmits, for example, an inspection signal indicating that clogging of the filter 34 is detected to the external device 6, and performs a reporting operation.
The external device 6 is, for example, a terminal such as a computer installed in a room on standby for a manager or the like of the power conversion system 10. The external device 6 may be, for example, a mobile terminal or the like carried by an administrator or the like of the power conversion system 10. The external device 6 may alternatively be a controller or the like that centrally controls the upper stage of the power conversion system 10.
The external device 6 has a display unit such as a liquid crystal display. The external device 6 displays characters, graphics, and the like indicating that clogging of the filter 34 is detected on the display unit in response to the reception of the inspection signal from the monitoring device 42. Thereby, the monitoring device 42 and the external device 6 report to the manager or the like that the clogging of the filter 34 is detected.
Further, for example, when any one of the plurality of filters 34 is detected to be clogged, the monitoring device 42 may include information on the filter 34 whose clogging is detected in the inspection signal. The external device 6 may display which filter 34 of the plurality of filters 34 is clogged on the display unit based on information included in the inspection signal, thereby notifying the clogged filter 34. Thus, even when there are a plurality of filters 34, it is possible to appropriately report which filter 34 is clogged to the manager or the like of the power conversion system 10.
The manner of the report by the external device 6 is not limited to display on the display unit, and for example, the report may be made by sound using a speaker or the like, or the report may be made by turning on or off a light using a lamp or the like. The reporting method of the external device 6 may be any method capable of appropriately reporting the detection of clogging of the filter 34 to a manager or the like.
The monitoring device 42 is configured to be able to communicate with each power conversion device 12. The communication between the monitoring device 42 and each power conversion device 12 may be wired or wireless. When the differential pressure measured by the differential pressure gauge 40 is equal to or greater than the threshold value, the monitoring device 42 performs an operation of reporting that clogging of the filter 34 is detected, and performs an output limiting operation of limiting the output of each power conversion device 12. The monitoring device 42 transmits, for example, an inspection signal to each power conversion device 12, and operates as an output limit.
Each power conversion device 12 limits the output power to a predetermined value or less in response to the reception of the check signal from the monitoring device 42. Each power conversion device 12 limits the magnitude of ac power output to the power grid 4 to a predetermined value or less, for example, in response to the reception of the check signal from the monitoring device 42. The output limiting operation of the monitoring device 42 is not limited to the transmission of the inspection signal to each power conversion device 12, and may be any operation that can limit the output of each power conversion device 12.
Fig. 2 is a flowchart schematically showing an example of the operation of the power conversion system according to the embodiment.
In the power conversion system 10, each power conversion device 12 converts dc power input from the power supply device 2 into ac power corresponding to the power grid 4, and outputs the converted ac power to the power grid 4. At this time, each power conversion device 12 drives fan 16. Each fan 16 cools each power conversion device 12 by discharging air in the casing 14 through the air outlet 32 and taking in outside air into the casing 14 through the air inlet 30.
In the power conversion system 10, the filter 34 is provided in the casing 14, and when the power conversion devices 12 are cooled by driving the fans 16, the filter 34 suppresses intrusion of dust, salt, and the like contained in the outside air into the casing 14.
In the power conversion system 10, each differential pressure gauge 40 of the maintenance support device 18 measures a differential pressure between the pressure on the front surface side of the filter 34 and the pressure on the back surface side of the filter 34 (step S101 in fig. 2). Each differential pressure gauge 40 inputs the measurement result of the differential pressure of each filter 34 to the monitoring device 42.
The monitoring device 42 determines whether or not the differential pressure of each filter 34 measured by each differential pressure gauge 40 is equal to or greater than a threshold value (step S102 in fig. 2). The monitoring device 42 may determine whether or not the average value of the differential pressures or the integrated value of the differential pressures is equal to or greater than a threshold value. When the monitoring device 42 determines that the measured value is smaller than the threshold value, the determination process is repeated based on the measurement results of the differential pressure meters 40.
On the other hand, when it is determined that the threshold value or more is present for any one of the filters 34, the monitoring device 42 transmits an inspection signal indicating that the clogging of the filter 34 is detected to the external device 6, thereby performing an operation of reporting that the clogging of the filter 34 is detected (step S103 in fig. 2).
The external device 6 displays characters, graphics, and the like on the display unit in response to the reception of the inspection signal from the monitoring device 42, thereby notifying the manager or the like that the clogging of the filter 34 has been detected.
Thus, in the power conversion system 10 and the maintenance support device 18, the manager or the like can visually check the clogging state of the filter 34 one by one without requiring an effort. In the case where the transmission of the inspection signal to the external device 6 is performed as a notification operation, for example, the manager or the like can also eliminate the need for an operation to rush to the housing 14 installed outdoors or the like. For example, the manager or the like can grasp the clogging of each filter 34 without going to the housing 14 and keeping the state in the management room or the like.
Further, the determination of the timing of maintenance of the filter 34 does not give a sense of the manager or the like. Therefore, the timing of maintenance of the filter 34 can be appropriately grasped. For example, it is possible to suppress an increase in labor of a manager or the like due to maintenance exceeding a necessary limit, or to suppress clogging of each filter 34 due to maintenance not performed even when a necessary period is reached.
As described above, in the power conversion system 10 and the maintenance support device 18 according to the present embodiment, the timing of maintenance of each filter 34 can be easily grasped. This enables the manager or the like of the power conversion system 10 to perform maintenance of each filter 34 at an appropriate timing. This can suppress, for example, clogging of each filter 34 and a rise in temperature of each power conversion device 12, which would cause each power conversion device 12 to stop the power conversion operation. Furthermore, it is possible to suppress an increase in load on each fan 16 due to clogging of each filter 34 and a failure of each fan 16. For example, when fan 16 is provided in power converter 12, power converter 12 may stop the power conversion operation when a failure of fan 16 is detected. By suppressing the failure of the fan 16 due to the clogging of the filter 34, it is possible to suppress the stop of the operation of the power conversion device 12 in association with the failure of the fan 16.
When it is determined that the threshold value or more is determined for any one of the filters 34, the monitoring device 42 performs an output limiting operation of performing an output limiting operation of limiting the output of each power converter 12 while performing a reporting operation (step S104 in fig. 2).
Each power conversion device 12 limits the magnitude of ac power output to the power grid 4 to a predetermined value or less, for example, in response to the reception of the check signal from the monitoring device 42. This can suppress an increase in the temperature of each power conversion device 12. For example, during a period from when the monitoring device 42 detects clogging of any one of the filters 34 to when maintenance is performed on the clogged filter 34, it is possible to suppress a temperature rise in each power conversion device 12 and stop the power conversion operation by each power conversion device 12.
The monitoring device 42 ends the reporting operation and the output limiting operation in accordance with the maintenance of the clogged filter 34 and the fact that the differential pressure (the average value of the differential pressures or the cumulative value of the differential pressures) of each filter 34 becomes smaller than the threshold value. In other words, the monitoring device 42 stops transmitting the inspection signal to the external equipment 6 and each power conversion device 12 in response to the differential pressure of each filter 34 becoming smaller than the threshold value. The same process is repeated below for the power conversion system 10 and the maintenance support device 18.
Fig. 3 is a block diagram schematically showing a modification of the power conversion system according to the embodiment.
As shown in fig. 3, the power conversion system 10a and the maintenance support device 18a have a differential pressure gauge 40 replaced with an air gauge 40a. Note that the same reference numerals are given to elements substantially identical in function and structure to those of the above-described embodiment, and detailed description thereof is omitted.
The air flow meter 40a measures the air flow rate of the outside air flowing into the casing 14 through the filter 34. When dust or the like adheres to the front surface side of the filter 34 and the filter 34 is clogged due to the continuous operation of the fan 16, the volume of the outside air flowing into the casing 14 through the filter 34 decreases compared to a state in which the filter 34 is not clogged. This also enables the air gauge 40a to measure the clogging state of the filter 34. The air flow meter 40a also functions as a measurement unit that measures the clogging state of the filter 34.
The monitor 42 receives the measurement result of the air volume from the air volume meter 40a. The monitoring device 42 determines whether or not the air volume measured by the air volume meter 40a is smaller than a threshold value. The monitoring device 42 determines that the clogging state of the filter 34 exceeds the threshold value when the air volume measured by the air volume meter 40a is smaller than the threshold value. In other words, the monitoring device 42 detects clogging of the filter 34 when the air volume measured by the air volume meter 40a is smaller than the threshold value.
The monitoring device 42 may determine that the clogging state of the filter 34 exceeds the threshold value, for example, when an average value of the air volume measured by the air volume meter 40a per predetermined time is smaller than the threshold value. The monitoring device 42 may determine that the clogging state of the filter 34 exceeds the threshold value, for example, when an accumulated value of the air volume measured by the air volume meter 40a per predetermined time is smaller than the threshold value. This can suppress erroneous inspection.
When the air volume measured by the air volume meter 40a is smaller than the threshold value, the monitoring device 42 performs a notification operation of notifying that the clogging of the filter 34 is detected and an output limiting operation of limiting the output of each power converter 12.
In this way, the measurement unit for measuring the clogging state of the filter 34 is not limited to the differential pressure gauge 40, and may be the air gauge 40a. The measurement unit may be an anemometer, for example. The monitoring device 42 may determine that the clogging state of the filter 34 exceeds the threshold value when the wind speed measured by the anemometer is less than the threshold value.
The measurement unit may be, for example, an optical sensor. When the filter 34 is clogged, the amount (brightness) of light entering the housing 14 through the filter 34 is reduced as compared with a state in which the filter 34 is not clogged. The monitoring device 42 may determine that the clogging state of the filter 34 exceeds the threshold value when the amount of light measured by the light sensor is smaller than the threshold value.
The measuring unit may be, for example, an ammeter that measures the magnitude of the current supplied to the fan 16. If the filter 34 is clogged, the load on the fan 16 increases as compared with a state in which the filter 34 is not clogged, and there is a possibility that the current for rotating the fan 16 at a predetermined rotation speed increases. The monitoring device 42 may determine that the clogging state of the filter 34 exceeds the threshold value when the magnitude of the current measured by the ammeter is equal to or larger than the threshold value.
For example, a rotation speed measuring device that measures the rotation speed of the fan 16 may be used as the measuring unit, and when the rotation speed of the fan 16 when a certain amount of electric power is supplied to the fan 16 becomes smaller than a threshold value, it may be determined that the clogging state of the filter 34 exceeds the threshold value. In this way, when the clogging state of the filter 34 is measured based on the change in the load of the fan 16, the function of the monitoring device 42 can be integrated with, for example, a driving unit for driving the fan 16.
The measuring unit is not limited to this, and may be any device capable of appropriately measuring the clogging state of the filter 34. The monitoring device 42 may be any device capable of determining whether or not the clogging state of the filter 34 exceeds a threshold value based on the measurement result of the measurement unit.
Fig. 4 is a block diagram schematically showing a modification of the power conversion system according to the embodiment.
As shown in fig. 4, the external device 6 is omitted from the power conversion system 10b and the maintenance support device 18b, and the monitoring device 42 is provided with a reporting unit 44. In other words, in this example, the monitoring device 42 has the reporting unit 44.
In this example, when it is determined that the clogging state of the filter 34 exceeds the threshold value, the monitoring device 42 performs a report operation of the reporting unit 44 as a report operation for reporting that the clogging of the filter 34 is detected.
The notification unit 44 is, for example, a display unit that notifies the manager or the like of the detection of the clogging of the filter 34 by displaying characters, graphics, or the like indicating that the clogging of the filter 34 is detected. However, the manner of the report by the report unit 44 is not limited to displaying characters, graphics, and the like, and for example, the report may be made by sound using a speaker or the like, or may be made by turning on or off a light using a lamp or the like. The reporting means of the reporting unit 44 may be any means capable of appropriately reporting the detection of clogging of the filter 34 to a manager or the like.
In this way, the reporting operation of the monitoring device 42 is not limited to the transmission of the inspection signal to the external device 6, and the reporting unit 44 provided in the monitoring device 42 may perform the reporting or the like. The reporting operation of the monitoring device 42 is not limited to this, and may be any operation that can appropriately report the detection of clogging of the filter 34 to a manager or the like of the power conversion system.
The report part 44 may be provided on the outer surface side of the housing 14, for example. Thus, the manager or the like of the power conversion system 10b can grasp the timing of maintenance of each filter 34 from the outside of the casing 14 without entering the casing 14 one by one.
Fig. 5 is a block diagram schematically showing a modification of the power conversion system according to the embodiment.
As shown in fig. 5, in the power conversion system 10c and the maintenance support device 18c, the monitoring device 42 is disposed outside the casing 14. In this example, the monitoring device 42 is, for example, a terminal such as a computer installed in a room where a manager of the power conversion system 10c stands by, a portable terminal carried by the manager of the power conversion system 10c, or a controller that centrally controls a higher-level of the power conversion system 10 c. In other words, the external device 6 according to the above embodiment may be used as the monitoring device 42.
In this example, the monitoring device 42 is configured to be able to communicate with the differential pressure gauge 40 (measurement unit). The communication between the monitoring device 42 and the differential pressure gauge 40 may be wired or wireless. The monitoring device 42 communicates with the differential pressure gauge 40 and receives an input of a measurement result of the differential pressure from the differential pressure gauge 40 to determine whether or not the clogging state of the filter 34 exceeds a threshold value.
Thus, the monitoring device 42 need not be provided inside the housing 14. The monitoring device 42 may also be provided outside the housing 14.
In the above embodiments, the present invention is applied to the case 14 installed outdoors or the like. The present invention is not limited to this, and may be applied to a case where an air inlet, an air outlet, and a filter are provided in the casing 12a of the power conversion device 12, for example. In other words, the present invention can be applied to a case where the power conversion device 12 of each of the above embodiments is a power conversion system, and a power conversion unit such as a plurality of switching elements provided in the casing 12a of the power conversion device 12 is a power conversion device.
Some embodiments of the present invention have been described, but these embodiments are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in other various ways, and various omissions, substitutions, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.
Claims (7)
1. A power conversion system is characterized by comprising:
a power conversion device that converts power;
a case having an internal space for housing the power conversion device, an air inlet for taking in the external air into the space, an air outlet for discharging the air in the space to the outside of the space, and a filter provided in the space so that the external air taken in from the air inlet passes through the filter;
a fan that discharges air in the casing through the exhaust port and takes in outside air from the intake port into the casing; and
and a maintenance support device including a measurement unit that measures a clogging state of the filter, and a monitoring device that performs a reporting operation of reporting that the clogging of the filter is detected when the clogging state of the filter measured by the measurement unit exceeds a threshold value.
2. The power conversion system of claim 1,
the monitoring device performs the notification operation and performs an output restriction operation for restricting the output of the power conversion device when the clogging state of the filter measured by the measurement unit exceeds a threshold value.
3. The power conversion system of claim 1,
the measuring unit is a differential pressure gauge for measuring a differential pressure between a pressure on a front surface side of the filter and a pressure on a back surface side of the filter,
the monitoring device determines that the clogging state of the filter exceeds a threshold value when the differential pressure measured by the differential pressure meter is equal to or greater than the threshold value.
4. The power conversion system of claim 1,
the monitoring device is configured to be capable of communicating with an external device provided outside the casing, and to transmit, as the notification operation, an inspection signal indicating that clogging of the filter is detected to the external device.
5. The power conversion system of claim 1,
the monitoring device includes a reporting unit that performs a report of the reporting unit as the reporting operation.
6. The power conversion system of claim 5,
the monitoring device is disposed outside the housing.
7. A maintenance support device for a power conversion system, the power conversion system comprising:
a power conversion device that converts power;
a case having an internal space for housing the power conversion device, an air inlet for taking in outside air into the space, an air outlet for discharging air in the space to the outside of the space, and a filter provided in the space so that the outside air taken in from the air inlet passes through the filter; and
a fan that discharges air in the casing through the exhaust port and takes in outside air from the intake port into the casing;
the maintenance support device is characterized by comprising:
a measuring unit that measures a clogging state of the filter; and
and a monitoring device that performs a reporting operation of reporting that the clogging of the filter is detected when the clogging of the filter measured by the measuring unit exceeds a threshold value.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2021/010847 WO2022195768A1 (en) | 2021-03-17 | 2021-03-17 | Power conversion system and maintenance assistance device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115804253A true CN115804253A (en) | 2023-03-14 |
Family
ID=83322017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180038551.5A Pending CN115804253A (en) | 2021-03-17 | 2021-03-17 | Power conversion system and maintenance support device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2022195768A1 (en) |
| CN (1) | CN115804253A (en) |
| WO (1) | WO2022195768A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1114292A (en) * | 1997-06-26 | 1999-01-22 | Takaoka Electric Mfg Co Ltd | Method and apparatus for monitoring clogging of air-cooled heat exchanger for stationary induction electric equipment |
| JP4175383B2 (en) * | 2006-05-15 | 2008-11-05 | セイコーエプソン株式会社 | Electronics |
| JP2011204737A (en) * | 2010-03-24 | 2011-10-13 | Tdk Corp | Electronic apparatus |
| JP2014098523A (en) * | 2012-11-15 | 2014-05-29 | Fujitsu Ltd | Cooling system and air filter clogging detection method |
| CN106068603B (en) * | 2015-02-23 | 2018-09-28 | 三菱电机株式会社 | Semi-conductor electricity force transducer |
-
2021
- 2021-03-17 WO PCT/JP2021/010847 patent/WO2022195768A1/en active Application Filing
- 2021-03-17 JP JP2023506594A patent/JPWO2022195768A1/ja active Pending
- 2021-03-17 CN CN202180038551.5A patent/CN115804253A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2022195768A1 (en) | 2022-09-22 |
| WO2022195768A1 (en) | 2022-09-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11841153B2 (en) | Thermostat with integrated submetering and control | |
| KR101584980B1 (en) | House type switchgear having a self power generation and condition control function | |
| CN110094842A (en) | Running state of air conditioner monitoring method | |
| US20060158037A1 (en) | Fully integrated power storage and supply appliance with power uploading capability | |
| CN108361916B (en) | Intelligent real-time air duct filter screen blockage degree judging system and method | |
| KR101919875B1 (en) | Intelligent protection apparatus of transformer and method for protecting the same | |
| KR20150131602A (en) | Underwater pump system | |
| KR101776163B1 (en) | Apparatus for controlling and monitoring pump interworking with remote control unit for water treatment system and wireless device | |
| KR101578478B1 (en) | Smart pump having data storage and monitoring system using the same | |
| KR101962238B1 (en) | Sensor monitoring system to detect abnormalities in electronic equipment | |
| KR101061220B1 (en) | Method for monitoring solar power plant, and monitoring device used therein | |
| CN101725519A (en) | Method for testing inlet temperature of blast-furnace blower | |
| CN115804253A (en) | Power conversion system and maintenance support device | |
| CN207914330U (en) | A kind of roughing mill and its temperature control system | |
| KR200446182Y1 (en) | City gas management system based on wireless communication | |
| CN201413190Y (en) | Vibration monitoring module | |
| KR100734149B1 (en) | Demand controller with built-in arc, heat and gas sensor for danger-monitering in electric panel | |
| KR101151675B1 (en) | Method of determining factors of defects at distributing board | |
| CN114994471A (en) | Heat accumulator insulation performance detection and protection device and method | |
| CN210664931U (en) | Phase modulator rotor packing cooling water leakage monitoring and analyzing device | |
| KR102363988B1 (en) | Preservation method of server rack | |
| CN209787698U (en) | Detectable energy storage equipment box | |
| JP4834521B2 (en) | Power supply device and electronic device | |
| CN210218191U (en) | Fan intelligence cloud monitoring device | |
| TWI554771B (en) | State detection devices and methods thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |